[Diy_efi] RE:Ignition amplifier Bosch 0-227-100-200

[Mike]

At 07:58 PM 5/17/06, you wrote:
>hi, i just went out in the cold shed, and on page 96 of the gregorys manual. it even  says it sa  power transistor .....

Think its classic case of over-simplification.

As Geoff mentioned there are other components attached to a basic
power transistor - that makes it an IC in my book,

mike



>mark k
>
>
>
>----- Original Message ----- From: "Mike" <niche at iinet.net.au>
>To: <diy_efi at diy-efi.org>
>Sent: Wednesday, May 17, 2006 9:00 PM
>Subject: Re: [Diy_efi] RE:Ignition amplifier Bosch 0-227-100-200
>
>
>>At 07:14 PM 5/17/06, you wrote:
>>>hi,   you sure it isnt a  powr transistor  ?
>>>
>>>cause  in the manual  i am pretty sure it tells u how to check it, and it mentions  c,b and e ?
>>
>>Yeah these are external reference pins which one can use to make
>>"some" tests however,  the reason its more than a power transistor is:-
>>
>>a.  It has a back emf zener or MOV inherent in the package
>>b.  The input (b) has a pre amp of sorts, its input current is far
>>    less than any npn power transistor for activation.
>>c.  The input of a normal power transistor pulls as much current
>>    as it can into a voltage drop of one diode, the RB30 device
>>    can accept a variable 3 to 10v input without pulling more than
>>    a few milliamps and still function.
>>d.  There is an input zener of sorts as well around 12 to 14volts
>>e.  Its Vsat is about one to two times a diode drop higher than
>>    a properly biased power transistor. This may be part of the
>>    coil back emf snubbing, I'm not sure but its not power transistor
>>    behaviour as a general rule etc.
>>
>>Having said that, there may be more than one type from the
>>last 25 years. All the units I have seen have an input voltage
>>much higher than a diode drop for fully on operation.
>>
>>btw: I'm interested which manual are you referring to ?
>>
>>Rgds
>>
>>mike
>>
>>
>>
>>>mark k
>>>
>>>
>>>----- Original Message ----- From: "Mike" <niche at iinet.net.au>
>>>To: <diy_efi at diy-efi.org>
>>>Sent: Wednesday, May 17, 2006 4:54 PM
>>>Subject: Re: [Diy_efi] RE:Ignition amplifier Bosch 0-227-100-200
>>>
>>>
>>>>I'm doing an uprated RB30 ignition module and toyed
>>>>with doing a dwell adjust, worked out an easy way to
>>>>do it along with auto retard for turbo boost, but decided to
>>>>keep it simple so first one will go out on market only
>>>>as upgrade with a couple of diagnostic functions. The old
>>>>unit by Nissan/Hitachi looks like a transistor but is an
>>>>IC in a To-3 can with back emf control but loses 1.5 to 2v
>>>>saturation plus it has a slightly variable response time.
>>>>Depending on how things go I might add a timer-control
>>>>chip to provide some dwell adjust for ECUs that dont offer it,
>>>>mine at present does its the Skyline/RB30 ECU with Bosch/Hitachi
>>>>innards...
>>>>
>>>>Rgds
>>>>
>>>>mike
>>>>
>>>>
>>>>At 01:16 AM 5/17/06, you wrote:
>>>>>Guys,
>>>>>
>>>>>thank you for help.
>>>>>
>>>>>My problem is that I have to use ignition amplifier that can control dwell. My ECU is not doing it, it only signals when the amplifier can start charging coils and when the spark should be fired.
>>>>>
>>>>>I hoped I could find one that has more than one end stage in the same package... and 0-227-100-200 was my candidate, as it was used even back in 80ies... but it seems like it isn't. :(
>>>>>
>>>>>I guess I would have to use 4 single amplifiers then...
>>>>>
>>>>>Thanks,
>>>>>NG
>>>>>
>>>>>Send instant messages to your online friends http://uk.messenger.yahoo.com
>>>>>_______________________________________________
>>>>>Diy_efi mailing list
>>>>>Diy_efi at diy-efi.org
>>>>>http://lists.diy-efi.org/mailman/listinfo/diy_efi
>>>>
>>>>
>>>>Regards from
>>>>
>>>>
>>>>Mike
>>>>Perth, Western Australia
>>>>VL Commodore Fuse Rail that wont warp or melt !
>>>>Twin tyres for most sedans, trikes and motorcycle sidecars
>>>>http://niche.iinet.net.au
>>>>_______________________________________________
>>>>Diy_efi mailing list
>>>>Diy_efi at diy-efi.org
>>>>http://lists.diy-efi.org/mailman/listinfo/diy_efi
>>>
>>>_______________________________________________
>>>Diy_efi mailing list
>>>Diy_efi at diy-efi.org
>>>http://lists.diy-efi.org/mailman/listinfo/diy_efi
>>
>>
>>Regards from
>>
>>
>>Mike
>>Perth, Western Australia
>>VL Commodore Fuse Rail that wont warp or melt !
>>Twin tyres for most sedans, trikes and motorcycle sidecars
>>http://niche.iinet.net.au
>>_______________________________________________
>>Diy_efi mailing list
>>Diy_efi at diy-efi.org
>>http://lists.diy-efi.org/mailman/listinfo/diy_efi 
>
>_______________________________________________
>Diy_efi mailing list
>Diy_efi at diy-efi.org
>http://lists.diy-efi.org/mailman/listinfo/diy_efi


Regards from


Mike
Perth, Western Australia
VL Commodore Fuse Rail that wont warp or melt !
Twin tyres for most sedans, trikes and motorcycle sidecars
http://niche.iinet.net.au